Owner reviews for spark plug

The NGK plugs are like $8ea when you buy 16. Still costs you nearly $800 less than what the dealer cost for that job is. And they last 60-75k miles.

Spark plugs do actually vary for some reason, I always use whats oem to the car. In my case thats the ngk iridium plugs (same goes for cables).

Fitting a decent set (Denso or NGK) of iridium plugs is also worthwhile.

Believe it or not I got the Genuine AC Delco iridiums from Home Depot for $3 a plug.

I changed the spark plugs in my nieces 2.5L VW Jetta because it was idling at 1300rpm. Rock solid idle at 700rpm afterwards. Easy way to save some gas.

NGK or bust.

He replaced the spark plugs and tested all of the ignition coils. Still had error code.

I recently took my stage 2 43K mile b8.5 s4 apart and did the PCV, water pump, thermostat, new 2 step colder brisk spark plugs gapped to .25. I took the spark plugs out and noticed heavy carbon and the ground electrode was white, even on all plugs . (20 miles on plugs)

I now dread doing spark plugs. Something that’s super easy to do on most 4 cyl cars is a PITA doing on my ej25.

NEVER USE THE DEALER FOR REPAIR WORK!